Shots fired amid violence at Guantanamo Bay

4/13/13 1:30 PM EDT

Violence broke out at the U.S. military's Guantanamo Bay detention center for terrorism suspects early Saturday, after the commander there ordered prisoners moved from communal living areas into single-person cells, a military statement said.

"Some detainees resisted with improvised weapons, and in response, four less-than-lethal rounds were fired," Joint Task Force Guantanamo announced Saturday afternoon. "There were no serious injuries to guards or detainees."

The statement said the Guantanamo commander ordered the change to single-prisoner cells in response to detainees covering windows and surveillance cameras, preventing continuous surveillance of the communal-living area known as Camp 6.

The unrest comes as at least several dozen detainees have embarked on a hunger strike to protest their treatment and the dim prospects for release. Some of the prisoners are being force fed to maintain their health.

Previously, a prisoner told his lawyer that the hunger strike that began Feb. 6 had grown to involve 130 men. A prison spokesman said at that time the strike involved 39 prisoners.